$ git clone -n https://src.fedoraproject.org/rpms/python-circuitbreaker.git /var/lib/mock/f45-build-29899-641/root/chroot_tmpdir/scmroot/python-circuitbreaker
Cloning into '/var/lib/mock/f45-build-29899-641/root/chroot_tmpdir/scmroot/python-circuitbreaker'...
$ git fetch origin 7e7ed78f3a5d3193d4b2c0144a59030b9fde6eaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-circuitbreaker
 * [new ref]         7e7ed78f3a5d3193d4b2c0144a59030b9fde6eaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e7ed78 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild