$ git clone -n https://src.fedoraproject.org/rpms/rust-just.git /var/lib/mock/f40-build-767452-124706/root/chroot_tmpdir/scmroot/rust-just
Cloning into '/var/lib/mock/f40-build-767452-124706/root/chroot_tmpdir/scmroot/rust-just'...
$ git fetch origin 039adee8e92cb0cfb76be6b32e0c501d738c0b92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-just
 * [new ref]         039adee8e92cb0cfb76be6b32e0c501d738c0b92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 039adee Update to 1.18.1 (#2255761)