$ git clone -n https://src.fedoraproject.org/rpms/oci-delta.git /var/lib/mock/f45-build-20867-574/root/chroot_tmpdir/scmroot/oci-delta
Cloning into '/var/lib/mock/f45-build-20867-574/root/chroot_tmpdir/scmroot/oci-delta'...
$ git fetch origin 637bf3156e3f0776d32a8e415bcee9af3dcefcf4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oci-delta
 * [new ref]         637bf3156e3f0776d32a8e415bcee9af3dcefcf4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 637bf31 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild