$ git clone -n https://src.fedoraproject.org/rpms/libsafec.git /var/lib/mock/f45-build-16922-493/root/chroot_tmpdir/scmroot/libsafec
Cloning into '/var/lib/mock/f45-build-16922-493/root/chroot_tmpdir/scmroot/libsafec'...
$ git fetch origin b66f06afdd9274a3d56b95ca69b14c4beca131bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsafec
 * [new ref]         b66f06afdd9274a3d56b95ca69b14c4beca131bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b66f06a Update to 3.9.2 (rhbz#2504293)