$ git clone -n https://src.fedoraproject.org/rpms/rubygem-mysql2.git /var/lib/mock/f29-build-452-309/root/thebuilddir/tmp/scmroot/rubygem-mysql2
Cloning into '/var/lib/mock/f29-build-452-309/root/thebuilddir/tmp/scmroot/rubygem-mysql2'...
$ git reset --hard 4b439e990363f34450d1bcc8c8d33ccccbbcb8a0
HEAD is now at 4b439e9 Rebuilt for switch to libxcrypt