$ git clone -n https://src.fedoraproject.org/rpms/rust-linux-loader.git /var/lib/mock/f39-build-2182909-51248/root/chroot_tmpdir/scmroot/rust-linux-loader
Cloning into '/var/lib/mock/f39-build-2182909-51248/root/chroot_tmpdir/scmroot/rust-linux-loader'...
$ git fetch origin cde9c27a2e376c0d47d8a76b2d0f5f7210a1ed8e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-linux-loader
 * [new ref]         cde9c27a2e376c0d47d8a76b2d0f5f7210a1ed8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cde9c27 Update to version 0.10.0