$ git clone -n https://src.fedoraproject.org/rpms/rust-colored_json.git /var/lib/mock/f39-build-1851226-42259/root/chroot_tmpdir/scmroot/rust-colored_json
Cloning into '/var/lib/mock/f39-build-1851226-42259/root/chroot_tmpdir/scmroot/rust-colored_json'...
$ git fetch origin 9a86c259fd05335dd0d084f1ead9e428ce11de10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-colored_json
 * [new ref]         9a86c259fd05335dd0d084f1ead9e428ce11de10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a86c25 Update to version 4.1.0; Fixes RHBZ#2249792