$ git clone -n https://src.fedoraproject.org/rpms/rust-cargo-options.git /var/lib/mock/f38-build-side-42-init-devel-1278100-30660/root/chroot_tmpdir/scmroot/rust-cargo-options
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1278100-30660/root/chroot_tmpdir/scmroot/rust-cargo-options'...
$ git fetch origin 955b6c5e457e1fb4038e3b3b0603d9767d294216:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cargo-options
 * [new ref]         955b6c5e457e1fb4038e3b3b0603d9767d294216 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 955b6c5 Initial import (#2187670)