[user@localhost ~]$ mkdir temp;cd temp;git init;git checkout -b stable
Initialized empty Git repository in /home/user/temp/.git/
Switched to a new branch 'stable'
[user@localhost temp]$ echo "a" >file1; echo "b" >file2
[user@localhost temp]$ git add file1 file2; git commit -am 'step1'
[stable (root-commit) b0da231] step1
 2 files changed, 2 insertions(+)
 create mode 100644 file1
 create mode 100644 file2
[user@localhost temp]$ git checkout -b fix1 ; echo "c" >file3; git add file3; git commit -am 'step2'
Switched to a new branch 'fix1'
[fix1 36f8fb6] step2
 1 file changed, 1 insertion(+)
 create mode 100644 file3
[user@localhost temp]$ git checkout stable; git checkout -b fix2;echo 'new' >file2; git commit -am 'step3';git checkout stable; git merge fix2
Switched to branch 'stable'
Switched to a new branch 'fix2'
[fix2 9e3cd7b] step3
 1 file changed, 1 insertion(+), 1 deletion(-)
Switched to branch 'stable'
Updating b0da231..9e3cd7b
Fast-forward
 file2 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
[user@localhost temp]$ git checkout fix1
Switched to branch 'fix1'
[user@localhost temp]$ git merge stable -m 'step4'
Merge made by the 'recursive' strategy.
 file2 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
[user@localhost temp]$ echo another >file3
[user@localhost temp]$ git commit -am 'step5'
[fix1 fab70e4] step5
 1 file changed, 1 insertion(+), 1 deletion(-)
[user@localhost temp]$ git log
commit fab70e43e1c3cedc422d697cad3dab1c9e35434f
Author: Alexander Kulikov <a.kulikov@id-network.ru>
Date:   Thu Feb 27 17:52:30 2020 +0300

    step5

commit 21677f0eb149bc5bb2afa34361854c034915b215
Merge: 36f8fb6 9e3cd7b
Author: Alexander Kulikov <a.kulikov@id-network.ru>
Date:   Thu Feb 27 17:52:08 2020 +0300

    step4

commit 9e3cd7b02927d3f3feb4782d751c39be213ebe69
Author: Alexander Kulikov <a.kulikov@id-network.ru>
Date:   Thu Feb 27 17:51:38 2020 +0300

    step3

commit 36f8fb6eef3490bd14271dcd1845762595288418
Author: Alexander Kulikov <a.kulikov@id-network.ru>
Date:   Thu Feb 27 17:50:59 2020 +0300

    step2

commit b0da231139e945837f317f1296de867df1ecadda
Author: Alexander Kulikov <a.kulikov@id-network.ru>
Date:   Thu Feb 27 17:50:26 2020 +0300

    step1
[user@localhost temp]$ git revert -m 1 21677f0eb149bc5bb2afa34361854c034915b215
[fix1 bb4ff83] Revert "step4"
 1 file changed, 1 insertion(+), 1 deletion(-)
[user@localhost temp]$ git checkout stable
Switched to branch 'stable'
[user@localhost temp]$ git merge fix1 -m step6
Updating 9e3cd7b..bb4ff83
Fast-forward
 file2 | 2 +-
 file3 | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)
 create mode 100644 file3
[user@localhost temp]$ cat file1
a
[user@localhost temp]$ cat file2
b
[user@localhost temp]$ cat file3
another