$ git clone -n https://src.fedoraproject.org/rpms/golang-github-xeipuuv-gojsonschema.git /var/lib/mock/f40-build-2263906-54543/root/chroot_tmpdir/scmroot/golang-github-xeipuuv-gojsonschema
Cloning into '/var/lib/mock/f40-build-2263906-54543/root/chroot_tmpdir/scmroot/golang-github-xeipuuv-gojsonschema'...
$ git fetch origin e13962920751080a48c07da6a1abf076c2d3c7b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-xeipuuv-gojsonschema
 * [new ref]         e13962920751080a48c07da6a1abf076c2d3c7b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e139629 Remove deprecated %patchN syntax