$ git clone -n https://src.fedoraproject.org/rpms/sdubby.git /var/lib/mock/f45-build-35797-699/root/chroot_tmpdir/scmroot/sdubby
Cloning into '/var/lib/mock/f45-build-35797-699/root/chroot_tmpdir/scmroot/sdubby'...
$ git fetch origin 1a2dee9b95146557ae509b1911d000bf25f7852c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sdubby
 * [new ref]         1a2dee9b95146557ae509b1911d000bf25f7852c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a2dee9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild