$ git clone -n https://src.fedoraproject.org/rpms/rust-rust-embed.git /var/lib/mock/f38-build-side-43-rust-devel-1397725-31053/root/chroot_tmpdir/scmroot/rust-rust-embed
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397725-31053/root/chroot_tmpdir/scmroot/rust-rust-embed'...
$ git fetch origin 026cc167fa1f26c4b93c28ed2c342e302f984a8e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rust-embed
 * [new ref]         026cc167fa1f26c4b93c28ed2c342e302f984a8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 026cc16 Update to version 6.8.1; Fixes RHBZ#2213642