$ git clone -n https://src.fedoraproject.org/rpms/golang-github-ipfs-block-format.git /var/lib/mock/f38-build-side-42-init-devel-833176-28376/root/chroot_tmpdir/scmroot/golang-github-ipfs-block-format
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-833176-28376/root/chroot_tmpdir/scmroot/golang-github-ipfs-block-format'...
$ git fetch origin ccd4785e44e06fa6353082c06b907c403774a096:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-ipfs-block-format
 * [new ref]         ccd4785e44e06fa6353082c06b907c403774a096 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ccd4785 Added the README