$ git clone -n https://src.fedoraproject.org/rpms/rednotebook.git /var/lib/mock/f45-build-34427-686/root/chroot_tmpdir/scmroot/rednotebook
Cloning into '/var/lib/mock/f45-build-34427-686/root/chroot_tmpdir/scmroot/rednotebook'...
$ git fetch origin 57f173f658ba33af7b7939b73d2a7abf58259d09:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rednotebook
 * [new ref]         57f173f658ba33af7b7939b73d2a7abf58259d09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57f173f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild