$ git clone -n https://src.fedoraproject.org/rpms/rubygem-parseconfig.git /var/lib/mock/f45-build-35141-693/root/chroot_tmpdir/scmroot/rubygem-parseconfig
Cloning into '/var/lib/mock/f45-build-35141-693/root/chroot_tmpdir/scmroot/rubygem-parseconfig'...
$ git fetch origin 9f693db3b9de47f3f084cd6525aaee9a0f25afba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-parseconfig
 * [new ref]         9f693db3b9de47f3f084cd6525aaee9a0f25afba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f693db Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild