$ git clone -n https://src.fedoraproject.org/rpms/rauc.git /var/lib/mock/f45-build-34335-684/root/chroot_tmpdir/scmroot/rauc
Cloning into '/var/lib/mock/f45-build-34335-684/root/chroot_tmpdir/scmroot/rauc'...
$ git fetch origin 0574887de553ebeaef59312c2642acf22fcdf4d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rauc
 * [new ref]         0574887de553ebeaef59312c2642acf22fcdf4d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0574887 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild