$ git clone -n https://src.fedoraproject.org/rpms/serd.git /var/lib/mock/f45-build-35803-699/root/chroot_tmpdir/scmroot/serd
Cloning into '/var/lib/mock/f45-build-35803-699/root/chroot_tmpdir/scmroot/serd'...
$ git fetch origin b30071b8d4e08d9177f27b73ccc4ea8f64de6d87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/serd
 * [new ref]         b30071b8d4e08d9177f27b73ccc4ea8f64de6d87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b30071b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild