$ git clone -n https://src.fedoraproject.org/rpms/ghc-haskell-src-exts.git /var/lib/mock/f45-build-10369-416/root/chroot_tmpdir/scmroot/ghc-haskell-src-exts
Cloning into '/var/lib/mock/f45-build-10369-416/root/chroot_tmpdir/scmroot/ghc-haskell-src-exts'...
$ git fetch origin 1d52806996181c98ef84612b7f13aae109e3ace0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-haskell-src-exts
 * [new ref]         1d52806996181c98ef84612b7f13aae109e3ace0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d52806 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild