$ git clone -n https://src.fedoraproject.org/rpms/golang-github-cespare-xxhash.git /var/lib/mock/f42-build-867082-174622/root/chroot_tmpdir/scmroot/golang-github-cespare-xxhash
Cloning into '/var/lib/mock/f42-build-867082-174622/root/chroot_tmpdir/scmroot/golang-github-cespare-xxhash'...
$ git fetch origin 6509a55fe5ca93b5b4306e7e5a747f5c40990794:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-cespare-xxhash
 * [new ref]         6509a55fe5ca93b5b4306e7e5a747f5c40990794 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6509a55 Drop goaltipaths