$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-gdkpixbuf.git /var/lib/mock/f39-build-1715597-41229/root/chroot_tmpdir/scmroot/ghc-gi-gdkpixbuf
Cloning into '/var/lib/mock/f39-build-1715597-41229/root/chroot_tmpdir/scmroot/ghc-gi-gdkpixbuf'...
$ git fetch origin 781b90870921b38bcaa1cc8914bff2bfdaeddd1b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-gdkpixbuf
 * [new ref]         781b90870921b38bcaa1cc8914bff2bfdaeddd1b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 781b908 https://hackage.haskell.org/package/gi-gdkpixbuf-2.0.31/changelog