$ git clone -n https://src.fedoraproject.org/rpms/rubygem-shellany.git /var/lib/mock/f45-build-35313-694/root/chroot_tmpdir/scmroot/rubygem-shellany
Cloning into '/var/lib/mock/f45-build-35313-694/root/chroot_tmpdir/scmroot/rubygem-shellany'...
$ git fetch origin 1f0a4e0aec7096b80e445c4944e38c248849bfaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-shellany
 * [new ref]         1f0a4e0aec7096b80e445c4944e38c248849bfaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f0a4e0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild