$ git clone -n https://src.fedoraproject.org/rpms/golang-github-dchest-siphash.git /var/lib/mock/f45-build-11860-435/root/chroot_tmpdir/scmroot/golang-github-dchest-siphash
Cloning into '/var/lib/mock/f45-build-11860-435/root/chroot_tmpdir/scmroot/golang-github-dchest-siphash'...
$ git fetch origin 0dcc75968bafe077125044c86d3d9dedaceae9a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-dchest-siphash
 * [new ref]         0dcc75968bafe077125044c86d3d9dedaceae9a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0dcc759 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild