$ git clone -n https://src.fedoraproject.org/rpms/stomppy.git /var/lib/mock/f45-build-36518-706/root/chroot_tmpdir/scmroot/stomppy
Cloning into '/var/lib/mock/f45-build-36518-706/root/chroot_tmpdir/scmroot/stomppy'...
$ git fetch origin 6af41a074f9df905f6347f691b23136a91bbddec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stomppy
 * [new ref]         6af41a074f9df905f6347f691b23136a91bbddec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6af41a0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild