$ git clone -n https://src.fedoraproject.org/rpms/golang-github-google-gnostic.git /var/lib/mock/f38-build-side-42-init-devel-1289673-30674/root/chroot_tmpdir/scmroot/golang-github-google-gnostic
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1289673-30674/root/chroot_tmpdir/scmroot/golang-github-google-gnostic'...
$ git fetch origin 3e95e58e701ddc787cb54750e1e908d0a9e28670:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-google-gnostic
 * [new ref]         3e95e58e701ddc787cb54750e1e908d0a9e28670 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e95e58 Added the README