$ git clone -n https://src.fedoraproject.org/rpms/hscolour.git /var/lib/mock/f45-build-13459-451/root/chroot_tmpdir/scmroot/hscolour
Cloning into '/var/lib/mock/f45-build-13459-451/root/chroot_tmpdir/scmroot/hscolour'...
$ git fetch origin 67669d61e787c9bd98b23181a704c57d0f611fd2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hscolour
 * [new ref]         67669d61e787c9bd98b23181a704c57d0f611fd2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67669d6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild