$ git clone -n https://src.fedoraproject.org/rpms/kf5-messagelib.git /var/lib/mock/f40-build-787339-134746/root/chroot_tmpdir/scmroot/kf5-messagelib
Cloning into '/var/lib/mock/f40-build-787339-134746/root/chroot_tmpdir/scmroot/kf5-messagelib'...
$ git fetch origin 2d40a0fdb01cf285bb766ee5daf0d12e447ea888:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-messagelib
 * [new ref]         2d40a0fdb01cf285bb766ee5daf0d12e447ea888 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d40a0f 23.08.5