$ git clone -n https://src.fedoraproject.org/rpms/rust-generic-array0.12.git /var/lib/mock/f40-build-2655660-66911/root/chroot_tmpdir/scmroot/rust-generic-array0.12
Cloning into '/var/lib/mock/f40-build-2655660-66911/root/chroot_tmpdir/scmroot/rust-generic-array0.12'...
$ git fetch origin e6497988be756fd7c4609cb709e3665dea016b44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-generic-array0.12
 * [new ref]         e6497988be756fd7c4609cb709e3665dea016b44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e649798 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild