$ git clone -n https://src.fedoraproject.org/rpms/rust-cargo-platform.git /var/lib/mock/f39-build-1488630-34499/root/chroot_tmpdir/scmroot/rust-cargo-platform
Cloning into '/var/lib/mock/f39-build-1488630-34499/root/chroot_tmpdir/scmroot/rust-cargo-platform'...
$ git fetch origin 7c2e95fd5dc0fb980b7e45b8c6d7596609e69f1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cargo-platform
 * [new ref]         7c2e95fd5dc0fb980b7e45b8c6d7596609e69f1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c2e95f Update to version 0.1.4; Fixes RHBZ#2242663