$ git clone -n https://src.fedoraproject.org/rpms/ghc-executable-path.git /var/lib/mock/f45-build-10253-414/root/chroot_tmpdir/scmroot/ghc-executable-path
Cloning into '/var/lib/mock/f45-build-10253-414/root/chroot_tmpdir/scmroot/ghc-executable-path'...
$ git fetch origin 2139e6f51ce5c664481305b96f795e22ae2928ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-executable-path
 * [new ref]         2139e6f51ce5c664481305b96f795e22ae2928ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2139e6f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild