$ git clone -n https://src.fedoraproject.org/rpms/rubygem-loofah.git /var/lib/mock/f45-build-35064-693/root/chroot_tmpdir/scmroot/rubygem-loofah
Cloning into '/var/lib/mock/f45-build-35064-693/root/chroot_tmpdir/scmroot/rubygem-loofah'...
$ git fetch origin 766d9891c9e3432b5d4302c76d8e9c8ee495f638:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-loofah
 * [new ref]         766d9891c9e3432b5d4302c76d8e9c8ee495f638 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 766d989 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild