Spigot build error

==> Starting build()...
Loading BuildTools version: git-BuildTools-1847da7-45 (#45)
BuildTools
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Starting clone of https://hub.spigotmc.org/stash/scm/spigot/bukkit.git to Bukkit
Exception in thread "main" org.eclipse.jgit.api.errors.TransportException: https://hub.spigotmc.org/stash/scm/spigot/bukkit.git: cannot open git-upload-pack
	at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:139)
	at org.eclipse.jgit.api.CloneCommand.fetch(CloneCommand.java:187)
	at org.eclipse.jgit.api.CloneCommand.call(CloneCommand.java:127)
	at org.spigotmc.builder.Builder.clone(Builder.java:619)
	at org.spigotmc.builder.Builder.main(Builder.java:171)
Caused by: org.eclipse.jgit.errors.TransportException: https://hub.spigotmc.org/stash/scm/spigot/bukkit.git: cannot open git-upload-pack
	at org.eclipse.jgit.transport.TransportHttp.connect(TransportHttp.java:524)
	at org.eclipse.jgit.transport.TransportHttp.openFetch(TransportHttp.java:309)
	at org.eclipse.jgit.transport.FetchProcess.executeImp(FetchProcess.java:136)
	at org.eclipse.jgit.transport.FetchProcess.execute(FetchProcess.java:122)
	at org.eclipse.jgit.transport.Transport.fetch(Transport.java:1138)
	at org.eclipse.jgit.api.FetchCommand.call(FetchCommand.java:130)
	... 4 more
Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: signature check failed
	at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1509)
	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:979)
	at sun.security.ssl.Handshaker.process_record(Handshaker.java:914)
	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
	at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:559)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1513)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1441)
	at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:338)
	at org.eclipse.jgit.transport.http.JDKHttpConnection.getResponseCode(JDKHttpConnection.java:98)
	at org.eclipse.jgit.util.HttpSupport.response(HttpSupport.java:168)
	at org.eclipse.jgit.transport.TransportHttp.connect(TransportHttp.java:475)
	... 9 more
Caused by: sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: signature check failed
	at sun.security.validator.PKIXValidator.doValidate(PKIXValidator.java:352)
	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:249)
	at sun.security.validator.Validator.validate(Validator.java:260)
	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1491)
	... 25 more
Caused by: java.security.cert.CertPathValidatorException: signature check failed
	at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:135)
	at sun.security.provider.certpath.PKIXCertPathValidator.validate(PKIXCertPathValidator.java:219)
	at sun.security.provider.certpath.PKIXCertPathValidator.validate(PKIXCertPathValidator.java:140)
	at sun.security.provider.certpath.PKIXCertPathValidator.engineValidate(PKIXCertPathValidator.java:79)
	at java.security.cert.CertPathValidator.validate(CertPathValidator.java:292)
	at sun.security.validator.PKIXValidator.doValidate(PKIXValidator.java:347)
	... 31 more
Caused by: java.security.SignatureException: Signature does not match.
	at sun.security.x509.X509CertImpl.verify(X509CertImpl.java:449)
	at sun.security.provider.certpath.BasicChecker.verifySignature(BasicChecker.java:166)
	at sun.security.provider.certpath.BasicChecker.check(BasicChecker.java:147)
	at sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:125)
	... 36 more
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Makepkg was unable to build spigot.