$ git clone -n https://src.fedoraproject.org/rpms/rubygem-locale.git /var/lib/mock/f45-build-35089-693/root/chroot_tmpdir/scmroot/rubygem-locale
Cloning into '/var/lib/mock/f45-build-35089-693/root/chroot_tmpdir/scmroot/rubygem-locale'...
$ git fetch origin 431af109054f25993d2b485e029bc260bffbd1c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-locale
 * [new ref]         431af109054f25993d2b485e029bc260bffbd1c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 431af10 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild