$ git clone -n https://src.fedoraproject.org/rpms/ghc-async.git /var/lib/mock/f45-build-9977-412/root/chroot_tmpdir/scmroot/ghc-async
Cloning into '/var/lib/mock/f45-build-9977-412/root/chroot_tmpdir/scmroot/ghc-async'...
$ git fetch origin 3b674764674d75dd79afb20c6ca9eb374e9850d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-async
 * [new ref]         3b674764674d75dd79afb20c6ca9eb374e9850d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b67476 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild