$ git clone -n https://src.fedoraproject.org/rpms/rust-clap.git /var/lib/mock/f45-build-40787-776/root/chroot_tmpdir/scmroot/rust-clap
Cloning into '/var/lib/mock/f45-build-40787-776/root/chroot_tmpdir/scmroot/rust-clap'...
$ git fetch origin 03997ed636f478f7003e05f24f89403871cb5da4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clap
 * [new ref]         03997ed636f478f7003e05f24f89403871cb5da4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03997ed Update to version 4.6.6; Fixes RHBZ#2512070