$ git clone -n https://src.fedoraproject.org/rpms/liferea.git /var/lib/mock/f41-build-side-1-2647790-27313/root/chroot_tmpdir/scmroot/liferea
Cloning into '/var/lib/mock/f41-build-side-1-2647790-27313/root/chroot_tmpdir/scmroot/liferea'...
$ git fetch origin aec8fe412f704d3294505c930761303530524f11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/liferea
 * [new ref]         aec8fe412f704d3294505c930761303530524f11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aec8fe4 bump version