$ git clone -n https://src.fedoraproject.org/rpms/rust-clap_builder.git /var/lib/mock/f39-build-2315251-57765/root/chroot_tmpdir/scmroot/rust-clap_builder
Cloning into '/var/lib/mock/f39-build-2315251-57765/root/chroot_tmpdir/scmroot/rust-clap_builder'...
$ git fetch origin e2662c4d6a01396dda5fe0c0d89e556e3903b35e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clap_builder
 * [new ref]         e2662c4d6a01396dda5fe0c0d89e556e3903b35e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2662c4 Update to version 4.4.16; Fixes RHBZ#2257293