$ git clone -n https://src.fedoraproject.org/rpms/rust-tinytemplate.git /var/lib/mock/f38-build-side-43-rust-devel-1414568-31449/root/chroot_tmpdir/scmroot/rust-tinytemplate
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1414568-31449/root/chroot_tmpdir/scmroot/rust-tinytemplate'...
$ git fetch origin 57ded1d8f9c7dd5a592d9be8436742840b20465a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tinytemplate
 * [new ref]         57ded1d8f9c7dd5a592d9be8436742840b20465a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 57ded1d Regenerate with rust2rpm v24