$ git clone -n https://src.fedoraproject.org/rpms/rust-memmap2_0.5.git /var/lib/mock/f40-build-2681875-67962/root/chroot_tmpdir/scmroot/rust-memmap2_0.5
Cloning into '/var/lib/mock/f40-build-2681875-67962/root/chroot_tmpdir/scmroot/rust-memmap2_0.5'...
$ git fetch origin b6f2743add32c0b857699e0e111c90a8a600c036:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-memmap2_0.5
 * [new ref]         b6f2743add32c0b857699e0e111c90a8a600c036 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6f2743 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild