$ git clone -n https://src.fedoraproject.org/rpms/gnote.git /var/lib/mock/f39-build-1533286-36227/root/chroot_tmpdir/scmroot/gnote
Cloning into '/var/lib/mock/f39-build-1533286-36227/root/chroot_tmpdir/scmroot/gnote'...
$ git fetch origin ff5939f008dd41bf9c4dea66640168575dfd8593:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnote
 * [new ref]         ff5939f008dd41bf9c4dea66640168575dfd8593 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff5939f Update to 45.0