$ git clone -n https://src.fedoraproject.org/rpms/python-blowfish.git /var/lib/mock/f45-build-29799-641/root/chroot_tmpdir/scmroot/python-blowfish
Cloning into '/var/lib/mock/f45-build-29799-641/root/chroot_tmpdir/scmroot/python-blowfish'...
$ git fetch origin ba46cd0de66e9a94aae4d14b130c2d3c3fa95c0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-blowfish
 * [new ref]         ba46cd0de66e9a94aae4d14b130c2d3c3fa95c0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba46cd0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild