$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-cmd-base.git /var/lib/mock/f40-build-2258816-54356/root/chroot_tmpdir/scmroot/rust-nu-cmd-base
Cloning into '/var/lib/mock/f40-build-2258816-54356/root/chroot_tmpdir/scmroot/rust-nu-cmd-base'...
$ git fetch origin ee9976c682021ac6c92809ed81a5ecdebd9de910:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-cmd-base
 * [new ref]         ee9976c682021ac6c92809ed81a5ecdebd9de910 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee9976c Update to 0.88.1