$ git clone -n https://src.fedoraproject.org/rpms/rust-timeago.git /var/lib/mock/f45-build-45509-823/root/chroot_tmpdir/scmroot/rust-timeago
Cloning into '/var/lib/mock/f45-build-45509-823/root/chroot_tmpdir/scmroot/rust-timeago'...
$ git fetch origin 438c1b823d0cfb4ae762d73dc788ecc6a6edfe12:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-timeago
 * [new ref]         438c1b823d0cfb4ae762d73dc788ecc6a6edfe12 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 438c1b8 Regenerate with rust2rpm v28