$ git clone -n https://src.fedoraproject.org/rpms/kdegraphics-thumbnailers.git /var/lib/mock/f40-build-2264304-54560/root/chroot_tmpdir/scmroot/kdegraphics-thumbnailers
Cloning into '/var/lib/mock/f40-build-2264304-54560/root/chroot_tmpdir/scmroot/kdegraphics-thumbnailers'...
$ git fetch origin b8f224d837bd0393ee0ab44dfa949eb8e8020e4a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kdegraphics-thumbnailers
 * [new ref]         b8f224d837bd0393ee0ab44dfa949eb8e8020e4a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8f224d 24.01.90