$ git clone -n https://gitee.com/fundawang/postfix.git /var/lib/mock/dist-an23-build-255452-63653/root/chroot_tmpdir/scmroot/postfix
Cloning into '/var/lib/mock/dist-an23-build-255452-63653/root/chroot_tmpdir/scmroot/postfix'...
$ git reset --hard 254f078594a83ab59b5634828aabcc6782aafe6c
HEAD is now at 254f078 3.7.5