$ git clone -n https://src.fedoraproject.org/rpms/percolator.git /var/lib/mock/f45-build-21541-586/root/chroot_tmpdir/scmroot/percolator
Cloning into '/var/lib/mock/f45-build-21541-586/root/chroot_tmpdir/scmroot/percolator'...
$ git fetch origin 156023a98e76baced02a0339848ab479e47f6dde:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/percolator
 * [new ref]         156023a98e76baced02a0339848ab479e47f6dde -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 156023a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild