$ git clone -n https://src.fedoraproject.org/rpms/mg.git /var/lib/mock/f33-build-141966-42634/root/chroot_tmpdir/scmroot/mg
Cloning into '/var/lib/mock/f33-build-141966-42634/root/chroot_tmpdir/scmroot/mg'...
$ git reset --hard 0224d59d3da4275e43bf6809a16d6c953757414a
HEAD is now at 0224d59 add new source