$ git clone -n https://src.fedoraproject.org/rpms/python-brian2.git /var/lib/mock/f41-build-813076-148555/root/chroot_tmpdir/scmroot/python-brian2
Cloning into '/var/lib/mock/f41-build-813076-148555/root/chroot_tmpdir/scmroot/python-brian2'...
$ git fetch origin 92b5262b849e45e1f6040d5fe0b28112a4f08779:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-brian2
 * [new ref]         92b5262b849e45e1f6040d5fe0b28112a4f08779 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92b5262 feat: update to 2.7.1 (fixes rh#2269724)