$ git clone -n https://src.fedoraproject.org/rpms/python-rpm-generators.git /var/lib/mock/f39-build-1553967-37018/root/chroot_tmpdir/scmroot/python-rpm-generators
Cloning into '/var/lib/mock/f39-build-1553967-37018/root/chroot_tmpdir/scmroot/python-rpm-generators'...
$ git fetch origin 8fe27ad070c104baac7e523fe241001892c24b46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-rpm-generators
 * [new ref]         8fe27ad070c104baac7e523fe241001892c24b46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fe27ad Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild