$ git clone -n https://src.fedoraproject.org/rpms/kst.git /var/lib/mock/f38-build-side-42-init-devel-791695-27999/root/chroot_tmpdir/scmroot/kst
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-791695-27999/root/chroot_tmpdir/scmroot/kst'...
$ git fetch origin aa674b9c17693fd1414e9648b1f123c1a7d7f578:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kst
 * [new ref]         aa674b9c17693fd1414e9648b1f123c1a7d7f578 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa674b9 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild