$ git clone -n https://src.fedoraproject.org/rpms/rust-cargo.git /var/lib/mock/f39-build-1646244-40385/root/chroot_tmpdir/scmroot/rust-cargo
Cloning into '/var/lib/mock/f39-build-1646244-40385/root/chroot_tmpdir/scmroot/rust-cargo'...
$ git fetch origin e634e64839ba21a31cb685000481152ae6a3877d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cargo
 * [new ref]         e634e64839ba21a31cb685000481152ae6a3877d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e634e64 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild