$ git clone -n https://src.fedoraproject.org/rpms/kf6-kbookmarks.git /var/lib/mock/f41-build-860270-168876/root/chroot_tmpdir/scmroot/kf6-kbookmarks
Cloning into '/var/lib/mock/f41-build-860270-168876/root/chroot_tmpdir/scmroot/kf6-kbookmarks'...
$ git fetch origin a913b793c80d04658c32bae31f2d11a756889f46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kbookmarks
 * [new ref]         a913b793c80d04658c32bae31f2d11a756889f46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a913b79 6.7.0