$ git clone -n https://src.fedoraproject.org/rpms/gnatcoll-db.git /var/lib/mock/f41-build-724024-13112/root/chroot_tmpdir/scmroot/gnatcoll-db
Cloning into '/var/lib/mock/f41-build-724024-13112/root/chroot_tmpdir/scmroot/gnatcoll-db'...
$ git fetch origin 6efb47dd56bae3ff4aeb7463de0cdd61955c867f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnatcoll-db
 * [new ref]         6efb47dd56bae3ff4aeb7463de0cdd61955c867f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6efb47d Bumped the release.