$ git clone -n https://src.fedoraproject.org/rpms/clamav-unofficial-sigs.git /var/lib/mock/f39-build-1591650-38294/root/chroot_tmpdir/scmroot/clamav-unofficial-sigs
Cloning into '/var/lib/mock/f39-build-1591650-38294/root/chroot_tmpdir/scmroot/clamav-unofficial-sigs'...
$ git fetch origin d79ba3247731f6a9dacc5a547af31f737f518813:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/clamav-unofficial-sigs
 * [new ref]         d79ba3247731f6a9dacc5a547af31f737f518813 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d79ba32 Migrated to SPDX license