$ git clone -n https://src.fedoraproject.org/rpms/rust-environment.git /var/lib/mock/f39-build-1517108-35685/root/chroot_tmpdir/scmroot/rust-environment
Cloning into '/var/lib/mock/f39-build-1517108-35685/root/chroot_tmpdir/scmroot/rust-environment'...
$ git fetch origin 4e9755a089c6c614346095fc275258e634451b53:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-environment
 * [new ref]         4e9755a089c6c614346095fc275258e634451b53 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e9755a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild