$ git clone -n https://src.fedoraproject.org/rpms/python-branca.git /var/lib/mock/f45-build-29858-641/root/chroot_tmpdir/scmroot/python-branca
Cloning into '/var/lib/mock/f45-build-29858-641/root/chroot_tmpdir/scmroot/python-branca'...
$ git fetch origin 8618b0deaf24d36404c245b840a3cb927db8b367:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-branca
 * [new ref]         8618b0deaf24d36404c245b840a3cb927db8b367 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8618b0d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild