$ git clone -n https://src.fedoraproject.org/rpms/rust-uncased.git /var/lib/mock/f40-build-2644231-66499/root/chroot_tmpdir/scmroot/rust-uncased
Cloning into '/var/lib/mock/f40-build-2644231-66499/root/chroot_tmpdir/scmroot/rust-uncased'...
$ git fetch origin 9848e2c1b1e4d681c8b3519242080af739902eeb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uncased
 * [new ref]         9848e2c1b1e4d681c8b3519242080af739902eeb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9848e2c Update to version 0.9.10; Fixes RHBZ#2259761