$ git clone -n https://src.fedoraproject.org/rpms/rubygem-hashery.git /var/lib/mock/f45-build-34980-692/root/chroot_tmpdir/scmroot/rubygem-hashery
Cloning into '/var/lib/mock/f45-build-34980-692/root/chroot_tmpdir/scmroot/rubygem-hashery'...
$ git fetch origin 89084f860ff2e4a99d7e1c5f9baa19d6d170ba68:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-hashery
 * [new ref]         89084f860ff2e4a99d7e1c5f9baa19d6d170ba68 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 89084f8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild