$ git clone -n https://src.fedoraproject.org/rpms/gnome-panel.git /var/lib/mock/f41-build-side-1-3002416-36543/root/chroot_tmpdir/scmroot/gnome-panel
Cloning into '/var/lib/mock/f41-build-side-1-3002416-36543/root/chroot_tmpdir/scmroot/gnome-panel'...
$ git fetch origin 1b482f1c032f33c107bc460a4f671361345e0f20:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-panel
 * [new ref]         1b482f1c032f33c107bc460a4f671361345e0f20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b482f1 Update to 3.54.0