$ git clone -n https://src.fedoraproject.org/rpms/ghc-scotty.git /var/lib/mock/f39-build-2011949-45757/root/chroot_tmpdir/scmroot/ghc-scotty
Cloning into '/var/lib/mock/f39-build-2011949-45757/root/chroot_tmpdir/scmroot/ghc-scotty'...
$ git fetch origin 3603dd64848e38ef058530e0b40da46853bf602a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-scotty
 * [new ref]         3603dd64848e38ef058530e0b40da46853bf602a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3603dd6 bump release