$ git clone -n https://src.fedoraproject.org/rpms/ghc-blaze-textual.git /var/lib/mock/f41-build-839106-159992/root/chroot_tmpdir/scmroot/ghc-blaze-textual
Cloning into '/var/lib/mock/f41-build-839106-159992/root/chroot_tmpdir/scmroot/ghc-blaze-textual'...
$ git fetch origin 8fdf735cd48010535353f61cf4633472de66bbf0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-blaze-textual
 * [new ref]         8fdf735cd48010535353f61cf4633472de66bbf0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fdf735 bump release