$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-command.git /var/lib/mock/f41-build-side-1-3149628-40527/root/chroot_tmpdir/scmroot/rust-nu-command
Cloning into '/var/lib/mock/f41-build-side-1-3149628-40527/root/chroot_tmpdir/scmroot/rust-nu-command'...
$ git fetch origin 590e54bd6d558536dffbaefdd9d66a6ae4d8b577:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-command
 * [new ref]         590e54bd6d558536dffbaefdd9d66a6ae4d8b577 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 590e54b Relax chrono-tz dependency to allow building with 0.8, 0.9, and 0.10