$ git clone -n https://src.fedoraproject.org/rpms/mp3fs.git /var/lib/mock/f40-build-746032-112345/root/chroot_tmpdir/scmroot/mp3fs
Cloning into '/var/lib/mock/f40-build-746032-112345/root/chroot_tmpdir/scmroot/mp3fs'...
$ git fetch origin af6dc6cf9c706920d601579ec417196c49ed9cbc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mp3fs
 * [new ref]         af6dc6cf9c706920d601579ec417196c49ed9cbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af6dc6c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild