$ git clone -n https://src.fedoraproject.org/rpms/rust-typed-builder.git /var/lib/mock/f38-build-side-42-init-devel-1396112-31050/root/chroot_tmpdir/scmroot/rust-typed-builder
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1396112-31050/root/chroot_tmpdir/scmroot/rust-typed-builder'...
$ git fetch origin 66b2b4c38ebf803c89a91400aacbbe5a1841cdb0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-typed-builder
 * [new ref]         66b2b4c38ebf803c89a91400aacbbe5a1841cdb0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66b2b4c Update to version 0.14.0; Fixes RHBZ#2138556