$ git clone -n https://src.fedoraproject.org/forks/loise/rpms/kf6-kimageformats.git /var/lib/mock/f43-build-58933278-6569344/root/chroot_tmpdir/scmroot/kf6-kimageformats
Cloning into '/var/lib/mock/f43-build-58933278-6569344/root/chroot_tmpdir/scmroot/kf6-kimageformats'...
$ git fetch origin ce4e0ed2fb6ffb3313d952230f0c45b16f6a2795:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/loise/rpms/kf6-kimageformats
 * [new ref]         ce4e0ed2fb6ffb3313d952230f0c45b16f6a2795 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce4e0ed add jxrlib and openjpeg2