$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-pango.git /var/lib/mock/f39-build-1922594-42979/root/chroot_tmpdir/scmroot/ghc-gi-pango
Cloning into '/var/lib/mock/f39-build-1922594-42979/root/chroot_tmpdir/scmroot/ghc-gi-pango'...
$ git fetch origin 3bbbc49a39e2a8b2d6a21429ce80192a76870d31:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-pango
 * [new ref]         3bbbc49a39e2a8b2d6a21429ce80192a76870d31 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bbbc49 https://hackage.haskell.org/package/gi-pango-1.0.29/changelog