$ git clone -n https://src.fedoraproject.org/rpms/rust-clap.git /var/lib/mock/f39-build-1523049-35982/root/chroot_tmpdir/scmroot/rust-clap
Cloning into '/var/lib/mock/f39-build-1523049-35982/root/chroot_tmpdir/scmroot/rust-clap'...
$ git fetch origin 20d6a843a0f6b75c0cc4239a9930a23946d8302c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clap
 * [new ref]         20d6a843a0f6b75c0cc4239a9930a23946d8302c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20d6a84 Update to version 4.4.6; Fixes RHBZ#2240687