$ git clone -n https://src.fedoraproject.org/rpms/dolphin.git /var/lib/mock/f39-build-1570668-37774/root/chroot_tmpdir/scmroot/dolphin
Cloning into '/var/lib/mock/f39-build-1570668-37774/root/chroot_tmpdir/scmroot/dolphin'...
$ git fetch origin b4382688ec8e657234339f591d478b222221569b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dolphin
 * [new ref]         b4382688ec8e657234339f591d478b222221569b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b438268 23.08.2