$ git clone -n https://src.fedoraproject.org/rpms/golang-github-howeyc-gopass.git /var/lib/mock/f40-build-2246087-53800/root/chroot_tmpdir/scmroot/golang-github-howeyc-gopass
Cloning into '/var/lib/mock/f40-build-2246087-53800/root/chroot_tmpdir/scmroot/golang-github-howeyc-gopass'...
$ git fetch origin 2beb3f59e4a3225298a54285ae09684539c51c5a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-howeyc-gopass
 * [new ref]         2beb3f59e4a3225298a54285ae09684539c51c5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2beb3f5 Remove deprecated %patchN syntax