$ git clone -n https://src.fedoraproject.org/rpms/rubygem-rake.git /var/lib/mock/f45-build-35255-694/root/chroot_tmpdir/scmroot/rubygem-rake
Cloning into '/var/lib/mock/f45-build-35255-694/root/chroot_tmpdir/scmroot/rubygem-rake'...
$ git fetch origin 73ece26362558f99ca145cd897dac952f5637bad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-rake
 * [new ref]         73ece26362558f99ca145cd897dac952f5637bad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 73ece26 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild