$ git clone -n https://src.fedoraproject.org/rpms/golang-github-theupdateframework-notary.git /var/lib/mock/f40-build-2252481-54188/root/chroot_tmpdir/scmroot/golang-github-theupdateframework-notary
Cloning into '/var/lib/mock/f40-build-2252481-54188/root/chroot_tmpdir/scmroot/golang-github-theupdateframework-notary'...
$ git fetch origin fc29337f3d5851e128dd38487eb51e515d37d6db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-theupdateframework-notary
 * [new ref]         fc29337f3d5851e128dd38487eb51e515d37d6db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc29337 Remove deprecated %patchN syntax