$ git clone -n https://src.fedoraproject.org/rpms/python-blosc.git /var/lib/mock/f41-build-812509-148420/root/chroot_tmpdir/scmroot/python-blosc
Cloning into '/var/lib/mock/f41-build-812509-148420/root/chroot_tmpdir/scmroot/python-blosc'...
$ git fetch origin 3ff014b945a8b16e5130f41b255415e95e1db4b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-blosc
 * [new ref]         3ff014b945a8b16e5130f41b255415e95e1db4b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ff014b update to 1.11.2 rhbz#2294171