$ git clone -n https://src.fedoraproject.org/rpms/kdesdk-thumbnailers.git /var/lib/mock/f39-build-1843577-42038/root/chroot_tmpdir/scmroot/kdesdk-thumbnailers
Cloning into '/var/lib/mock/f39-build-1843577-42038/root/chroot_tmpdir/scmroot/kdesdk-thumbnailers'...
$ git fetch origin d68454d903fbe95d857e616c8b124f4d076a3af4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdesdk-thumbnailers
 * [new ref]         d68454d903fbe95d857e616c8b124f4d076a3af4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d68454d 23.08.3