$ git clone -n https://src.fedoraproject.org/rpms/sweeper.git /var/lib/mock/f39-build-2063965-49192/root/chroot_tmpdir/scmroot/sweeper
Cloning into '/var/lib/mock/f39-build-2063965-49192/root/chroot_tmpdir/scmroot/sweeper'...
$ git fetch origin 632d718b367f92287ad04b1bde4e9b294ac7be33:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sweeper
 * [new ref]         632d718b367f92287ad04b1bde4e9b294ac7be33 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 632d718 23.08.4