$ git clone -n https://src.fedoraproject.org/rpms/rubygem-globalid.git /var/lib/mock/f45-build-34934-692/root/chroot_tmpdir/scmroot/rubygem-globalid
Cloning into '/var/lib/mock/f45-build-34934-692/root/chroot_tmpdir/scmroot/rubygem-globalid'...
$ git fetch origin 7a63c90f0a8232d8ffd1319686b2bb0d8f0439fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-globalid
 * [new ref]         7a63c90f0a8232d8ffd1319686b2bb0d8f0439fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a63c90 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild