$ git clone -n https://src.fedoraproject.org/rpms/rubygem-parse-cron.git /var/lib/mock/f45-build-35091-693/root/chroot_tmpdir/scmroot/rubygem-parse-cron
Cloning into '/var/lib/mock/f45-build-35091-693/root/chroot_tmpdir/scmroot/rubygem-parse-cron'...
$ git fetch origin bac040f868add4ec6f521bc6961fea4d85836da1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-parse-cron
 * [new ref]         bac040f868add4ec6f521bc6961fea4d85836da1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
Updating files: 100% (3/3)
Updating files: 100% (3/3), done.
HEAD is now at bac040f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild