$ git clone -n https://src.fedoraproject.org/rpms/kshisen.git /var/lib/mock/f39-build-1708819-41222/root/chroot_tmpdir/scmroot/kshisen
Cloning into '/var/lib/mock/f39-build-1708819-41222/root/chroot_tmpdir/scmroot/kshisen'...
$ git fetch origin fc6748602e3dd895d86b8c35d429a36304296c13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kshisen
 * [new ref]         fc6748602e3dd895d86b8c35d429a36304296c13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc67486 23.08.3