$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-gdkpixbuf.git /var/lib/mock/f41-build-723958-13112/root/chroot_tmpdir/scmroot/ghc-gi-gdkpixbuf
Cloning into '/var/lib/mock/f41-build-723958-13112/root/chroot_tmpdir/scmroot/ghc-gi-gdkpixbuf'...
$ git fetch origin ec9910fe6b0db0caa3c4c0abcef42bfd27de14b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-gdkpixbuf
 * [new ref]         ec9910fe6b0db0caa3c4c0abcef42bfd27de14b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec9910f cabal-rpm-2.1.5