$ git clone -n https://src.fedoraproject.org/rpms/flowcanvas.git /var/lib/mock/f41-build-1020749-18018/root/chroot_tmpdir/scmroot/flowcanvas
Cloning into '/var/lib/mock/f41-build-1020749-18018/root/chroot_tmpdir/scmroot/flowcanvas'...
$ git fetch origin 90f870bf36a70370f4a75a549cc969ff7f0dc229:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flowcanvas
 * [new ref]         90f870bf36a70370f4a75a549cc969ff7f0dc229 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90f870b Eliminate use of obsolete %patchN syntax (#2283636)