$ git clone -n https://src.fedoraproject.org/rpms/guitarix.git /var/lib/mock/f39-build-1539734-36447/root/chroot_tmpdir/scmroot/guitarix
Cloning into '/var/lib/mock/f39-build-1539734-36447/root/chroot_tmpdir/scmroot/guitarix'...
$ git fetch origin dd2c3e545f55712363189b5b8e2bec09d90480df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/guitarix
 * [new ref]         dd2c3e545f55712363189b5b8e2bec09d90480df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd2c3e5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild