$ git clone -n https://src.fedoraproject.org/rpms/wemux.git /var/lib/mock/f45-build-38310-723/root/chroot_tmpdir/scmroot/wemux
Cloning into '/var/lib/mock/f45-build-38310-723/root/chroot_tmpdir/scmroot/wemux'...
$ git fetch origin dee0af01b1f329002751748f9ca0dc7d3b667b44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wemux
 * [new ref]         dee0af01b1f329002751748f9ca0dc7d3b667b44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dee0af0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild