$ git clone -n https://src.fedoraproject.org/rpms/rubygem-gssapi.git /var/lib/mock/f45-build-34947-692/root/chroot_tmpdir/scmroot/rubygem-gssapi
Cloning into '/var/lib/mock/f45-build-34947-692/root/chroot_tmpdir/scmroot/rubygem-gssapi'...
$ git fetch origin d2ea3babd7579b0c801f1bac62a2fb4aab80ae5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-gssapi
 * [new ref]         d2ea3babd7579b0c801f1bac62a2fb4aab80ae5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2ea3ba Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild