$ git clone -n https://src.fedoraproject.org/rpms/mrchem.git /var/lib/mock/f41-build-847441-163983/root/chroot_tmpdir/scmroot/mrchem
Cloning into '/var/lib/mock/f41-build-847441-163983/root/chroot_tmpdir/scmroot/mrchem'...
$ git fetch origin accb532d6419794857fcbe9e7d55f79f9032ca15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mrchem
 * [new ref]         accb532d6419794857fcbe9e7d55f79f9032ca15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at accb532 Update to 1.1.4