$ git clone -n https://src.fedoraproject.org/rpms/bwbar.git /var/lib/mock/f45-build-4797-334/root/chroot_tmpdir/scmroot/bwbar
Cloning into '/var/lib/mock/f45-build-4797-334/root/chroot_tmpdir/scmroot/bwbar'...
$ git fetch origin 23f2eee53771635adf05f05b1688497088204edc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bwbar
 * [new ref]         23f2eee53771635adf05f05b1688497088204edc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23f2eee Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild