$ git clone -n https://src.fedoraproject.org/rpms/python-debtcollector.git /var/lib/mock/f45-build-39942-765/root/chroot_tmpdir/scmroot/python-debtcollector
Cloning into '/var/lib/mock/f45-build-39942-765/root/chroot_tmpdir/scmroot/python-debtcollector'...
$ git fetch origin 6d3aa9858dfe4ad0d58f6ba0c8ad66f6fd96295d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-debtcollector
 * [new ref]         6d3aa9858dfe4ad0d58f6ba0c8ad66f6fd96295d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d3aa98 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild