$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-gio.git /var/lib/mock/f41-build-1020896-18021/root/chroot_tmpdir/scmroot/ghc-gi-gio
Cloning into '/var/lib/mock/f41-build-1020896-18021/root/chroot_tmpdir/scmroot/ghc-gi-gio'...
$ git fetch origin 0fa6cf79f687679016050c51f0ab76a55638726b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-gio
 * [new ref]         0fa6cf79f687679016050c51f0ab76a55638726b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fa6cf7 cabal-rpm-2.1.5