$ git clone -n https://src.fedoraproject.org/rpms/gtorrentviewer.git /var/lib/mock/f41-build-778311-13541/root/chroot_tmpdir/scmroot/gtorrentviewer
Cloning into '/var/lib/mock/f41-build-778311-13541/root/chroot_tmpdir/scmroot/gtorrentviewer'...
$ git fetch origin 6e59fda4ba986b0a9d31817b35bcd7d717df6c37:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtorrentviewer
 * [new ref]         6e59fda4ba986b0a9d31817b35bcd7d717df6c37 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e59fda Eliminate use of obsolete %patchN syntax (#2283636)