$ git clone -n https://src.fedoraproject.org/rpms/ghc-mmap.git /var/lib/mock/f40-build-776073-128585/root/chroot_tmpdir/scmroot/ghc-mmap
Cloning into '/var/lib/mock/f40-build-776073-128585/root/chroot_tmpdir/scmroot/ghc-mmap'...
$ git fetch origin ce2c4e100c22234292d2cc22ce6e8b520865d883:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-mmap
 * [new ref]         ce2c4e100c22234292d2cc22ce6e8b520865d883 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce2c4e1 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild