$ git clone -n https://src.fedoraproject.org/rpms/python-jaraco-test.git /var/lib/mock/f45-build-31165-650/root/chroot_tmpdir/scmroot/python-jaraco-test
Cloning into '/var/lib/mock/f45-build-31165-650/root/chroot_tmpdir/scmroot/python-jaraco-test'...
$ git fetch origin 56e326cb1a4c65a3b828fb66d7db6bb9e37991d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jaraco-test
 * [new ref]         56e326cb1a4c65a3b828fb66d7db6bb9e37991d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56e326c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild