$ git clone -n https://src.fedoraproject.org/rpms/mdk.git /var/lib/mock/f41-build-829500-156128/root/chroot_tmpdir/scmroot/mdk
Cloning into '/var/lib/mock/f41-build-829500-156128/root/chroot_tmpdir/scmroot/mdk'...
$ git fetch origin 5df4983cde3146e30899e54bdd0178376871136f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mdk
 * [new ref]         5df4983cde3146e30899e54bdd0178376871136f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5df4983 - Update to 1.3.0 fixes rhbz#2294803