$ git clone -n https://src.fedoraproject.org/rpms/ghc-http2.git /var/lib/mock/f39-build-1918605-42935/root/chroot_tmpdir/scmroot/ghc-http2
Cloning into '/var/lib/mock/f39-build-1918605-42935/root/chroot_tmpdir/scmroot/ghc-http2'...
$ git fetch origin 1c89ebf5f149d6b0774413449e96e26cc986e483:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http2
 * [new ref]         1c89ebf5f149d6b0774413449e96e26cc986e483 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c89ebf https://hackage.haskell.org/package/http2-4.1.4/changelog