$ git clone -n https://src.fedoraproject.org/rpms/ghc-haskell-src-exts-util.git /var/lib/mock/f45-build-10378-416/root/chroot_tmpdir/scmroot/ghc-haskell-src-exts-util
Cloning into '/var/lib/mock/f45-build-10378-416/root/chroot_tmpdir/scmroot/ghc-haskell-src-exts-util'...
$ git fetch origin 5b4e78156d18bce95c749d9942eef0d4c28558fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-haskell-src-exts-util
 * [new ref]         5b4e78156d18bce95c749d9942eef0d4c28558fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b4e781 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild