$ git clone -n https://src.fedoraproject.org/rpms/xmvn-generator.git /var/lib/mock/f39-build-2234512-53401/root/chroot_tmpdir/scmroot/xmvn-generator
Cloning into '/var/lib/mock/f39-build-2234512-53401/root/chroot_tmpdir/scmroot/xmvn-generator'...
$ git fetch origin 13ae66b216249f24befa81d0a216b2e1fbb1c7b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xmvn-generator
 * [new ref]         13ae66b216249f24befa81d0a216b2e1fbb1c7b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 13ae66b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild