$ git clone -n https://src.fedoraproject.org/rpms/python-emcee.git /var/lib/mock/f45-build-30574-646/root/chroot_tmpdir/scmroot/python-emcee
Cloning into '/var/lib/mock/f45-build-30574-646/root/chroot_tmpdir/scmroot/python-emcee'...
$ git fetch origin ad377ef2d6ccd8108808be670473beb83a4e0d27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-emcee
 * [new ref]         ad377ef2d6ccd8108808be670473beb83a4e0d27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad377ef Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild