$ git clone -n https://src.fedoraproject.org/rpms/rust-colored_json.git /var/lib/mock/f41-build-side-1-2923672-34982/root/chroot_tmpdir/scmroot/rust-colored_json
Cloning into '/var/lib/mock/f41-build-side-1-2923672-34982/root/chroot_tmpdir/scmroot/rust-colored_json'...
$ git fetch origin 1f5038df112b7d8422dee32e203596c58116dc74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-colored_json
 * [new ref]         1f5038df112b7d8422dee32e203596c58116dc74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f5038d Update to version 5.0.0 (rhbz#2273632)