$ git clone -n https://src.fedoraproject.org/rpms/golang-github-google-uuid.git /var/lib/mock/f40-build-2667866-67175/root/chroot_tmpdir/scmroot/golang-github-google-uuid
Cloning into '/var/lib/mock/f40-build-2667866-67175/root/chroot_tmpdir/scmroot/golang-github-google-uuid'...
$ git fetch origin 0e5edea1e016a05104cd622e6c145a08310a29d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-google-uuid
 * [new ref]         0e5edea1e016a05104cd622e6c145a08310a29d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0e5edea Update to 1.6.0 - Closes rhbz#2260007