$ git clone -n https://src.fedoraproject.org/rpms/golang-github-docker-connections.git /var/lib/mock/f40-build-2240875-53656/root/chroot_tmpdir/scmroot/golang-github-docker-connections
Cloning into '/var/lib/mock/f40-build-2240875-53656/root/chroot_tmpdir/scmroot/golang-github-docker-connections'...
$ git fetch origin c8c84e8a37fe44cdc91d7d3e9325feda5ab267cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-docker-connections
 * [new ref]         c8c84e8a37fe44cdc91d7d3e9325feda5ab267cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8c84e8 Remove deprecated %patchN syntax