$ git clone -n https://src.fedoraproject.org/rpms/rubygem-ruby-progressbar.git /var/lib/mock/f45-build-35262-694/root/chroot_tmpdir/scmroot/rubygem-ruby-progressbar
Cloning into '/var/lib/mock/f45-build-35262-694/root/chroot_tmpdir/scmroot/rubygem-ruby-progressbar'...
$ git fetch origin af81328e97504ea6722320d05ccf2af3c6754f1b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-ruby-progressbar
 * [new ref]         af81328e97504ea6722320d05ccf2af3c6754f1b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af81328 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild