$ git clone -n https://src.fedoraproject.org/rpms/tintin.git /var/lib/mock/f45-build-37143-711/root/chroot_tmpdir/scmroot/tintin
Cloning into '/var/lib/mock/f45-build-37143-711/root/chroot_tmpdir/scmroot/tintin'...
$ git fetch origin 05827603c35de48c18e992ea9df03d54cd4ebf5e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tintin
 * [new ref]         05827603c35de48c18e992ea9df03d54cd4ebf5e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0582760 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild