$ git clone -n https://src.fedoraproject.org/rpms/ghc-system-filepath.git /var/lib/mock/f45-build-10814-424/root/chroot_tmpdir/scmroot/ghc-system-filepath
Cloning into '/var/lib/mock/f45-build-10814-424/root/chroot_tmpdir/scmroot/ghc-system-filepath'...
$ git fetch origin ca1f73ffea079144e888194a984f7ba238f235b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-system-filepath
 * [new ref]         ca1f73ffea079144e888194a984f7ba238f235b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca1f73f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild