$ git clone -n https://src.fedoraproject.org/rpms/golang-github-ipfs-merkledag.git /var/lib/mock/f38-build-side-42-init-devel-720949-27296/root/chroot_tmpdir/scmroot/golang-github-ipfs-merkledag
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-720949-27296/root/chroot_tmpdir/scmroot/golang-github-ipfs-merkledag'...
$ git fetch origin 0cba9f5e544d5f950b7796e4256be5617b042595:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-ipfs-merkledag
 * [new ref]         0cba9f5e544d5f950b7796e4256be5617b042595 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0cba9f5 Added the README