gcc-git error

pacaur -S gcc-git
:: Package(s) gcc-git not found in repositories, trying AUR...
:: resolving dependencies...
:: looking for inter-conflicts...
:: gcc-git and gcc are in conflict (gcc). Remove gcc? [y/N] y
:: gcc-libs-git and gcc-libs are in conflict (gcc-libs). Remove gcc-libs? [y/N] y

AUR Packages  (2) gcc-git-latest  gcc-libs-git-latest

:: Proceed with installation? [Y/n] y
:: Retrieving package(s)...
:: gcc-git build files are up-to-date -- skipping
:: Checking gcc-git,gcc-libs-git integrity...
==> Making package: gcc-git 6.0.0.r143660.7b0b2ad-1 (Wed Jan 25 19:17:36 EET 2017)
==> Retrieving sources...
  -> Updating gcc git repo...
Fetching origin
  -> Found isl-0.15.tar.bz2
==> Validating source files with md5sums...
    gcc ... Skipped
    isl-0.15.tar.bz2 ... Passed
:: Building gcc-git,gcc-libs-git package(s)...
==> Making package: gcc-git 6.0.0.r143660.7b0b2ad-1 (Wed Jan 25 19:17:44 EET 2017)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Updating gcc git repo...
Fetching origin
  -> Found isl-0.15.tar.bz2
==> Validating source files with md5sums...
    gcc ... Skipped
    isl-0.15.tar.bz2 ... Passed
==> Extracting sources...
  -> Creating working copy of gcc git repo...
fatal: Cannot update paths and switch to branch 'makepkg' at the same time.
Did you intend to checkout 'origin/HEAD' which can not be resolved as commit?
==> ERROR: Failure while creating working copy of gcc git repo
    Aborting...
:: failed to build gcc-git,gcc-libs-git package(s)