$ git clone -n https://src.fedoraproject.org/rpms/sudo-rs.git /var/lib/mock/f42-build-side-1-3540430-46574/root/chroot_tmpdir/scmroot/sudo-rs
Cloning into '/var/lib/mock/f42-build-side-1-3540430-46574/root/chroot_tmpdir/scmroot/sudo-rs'...
$ git fetch origin 2049f05c6e2019cadaa31cb1b2dec2aabaef2f28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sudo-rs
 * [new ref]         2049f05c6e2019cadaa31cb1b2dec2aabaef2f28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2049f05 Update to version 0.2.6; Fixes RHBZ#2356685