$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-glib.git /var/lib/mock/f41-build-1020897-18021/root/chroot_tmpdir/scmroot/ghc-gi-glib
Cloning into '/var/lib/mock/f41-build-1020897-18021/root/chroot_tmpdir/scmroot/ghc-gi-glib'...
$ git fetch origin 26a74e96d6762b1b52159e4bfce5e6b648d0ff28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-glib
 * [new ref]         26a74e96d6762b1b52159e4bfce5e6b648d0ff28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26a74e9 Rebuild with haskell-gi-0.26.8