$ git clone -n https://src.fedoraproject.org/rpms/python-brian2.git /var/lib/mock/f40-build-746587-112722/root/chroot_tmpdir/scmroot/python-brian2
Cloning into '/var/lib/mock/f40-build-746587-112722/root/chroot_tmpdir/scmroot/python-brian2'...
$ git fetch origin f47be05560e15c8c806556f86fcd6f4bca1a2c2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-brian2
 * [new ref]         f47be05560e15c8c806556f86fcd6f4bca1a2c2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f47be05 feat: update to 2.5.4 (fixes rh#2216804)