$ git clone -n https://src.fedoraproject.org/rpms/ghc-mmap.git /var/lib/mock/f45-build-10537-418/root/chroot_tmpdir/scmroot/ghc-mmap
Cloning into '/var/lib/mock/f45-build-10537-418/root/chroot_tmpdir/scmroot/ghc-mmap'...
$ git fetch origin c6840629df59967fea977692aa4ba2015279511b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-mmap
 * [new ref]         c6840629df59967fea977692aa4ba2015279511b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c684062 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild