$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-color-config.git /var/lib/mock/f40-build-2707230-71292/root/chroot_tmpdir/scmroot/rust-nu-color-config
Cloning into '/var/lib/mock/f40-build-2707230-71292/root/chroot_tmpdir/scmroot/rust-nu-color-config'...
$ git fetch origin d9a59cdea895e41bccc7ccd10ec33c473b8030e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-color-config
 * [new ref]         d9a59cdea895e41bccc7ccd10ec33c473b8030e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d9a59cd Update to 0.91.0 (rhbz#2257502)