$ git clone -n https://src.fedoraproject.org/rpms/libxlsxwriter.git /var/lib/mock/f40-build-2008887-45422/root/chroot_tmpdir/scmroot/libxlsxwriter
Cloning into '/var/lib/mock/f40-build-2008887-45422/root/chroot_tmpdir/scmroot/libxlsxwriter'...
$ git fetch origin 12fd0de9032668470389d458c8b8b44d1321f06a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libxlsxwriter
 * [new ref]         12fd0de9032668470389d458c8b8b44d1321f06a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12fd0de Fix typo in changelog