$ git clone -n https://src.fedoraproject.org/rpms/python-blosc2.git /var/lib/mock/f40-build-734700-106020/root/chroot_tmpdir/scmroot/python-blosc2
Cloning into '/var/lib/mock/f40-build-734700-106020/root/chroot_tmpdir/scmroot/python-blosc2'...
$ git fetch origin 7909957666eff13e8e55c5d4fc76d8f384be0967:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-blosc2
 * [new ref]         7909957666eff13e8e55c5d4fc76d8f384be0967 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7909957 Build with cython-0.29