$ git clone -n https://src.fedoraproject.org/rpms/rust-typed-builder.git /var/lib/mock/f40-build-704205-12987/root/chroot_tmpdir/scmroot/rust-typed-builder
Cloning into '/var/lib/mock/f40-build-704205-12987/root/chroot_tmpdir/scmroot/rust-typed-builder'...
$ git fetch origin 9b878298d6f4f01c250e139117e3c04105001e08:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-typed-builder
 * [new ref]         9b878298d6f4f01c250e139117e3c04105001e08 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b87829 Update to version 0.18.2; Fixes RHBZ#2220655