$ git clone -n https://src.fedoraproject.org/rpms/rust-adblock.git /var/lib/mock/f41-build-side-1-2911720-34774/root/chroot_tmpdir/scmroot/rust-adblock
Cloning into '/var/lib/mock/f41-build-side-1-2911720-34774/root/chroot_tmpdir/scmroot/rust-adblock'...
$ git fetch origin dbac42e9f691c57302cd702c5bd33868fde3b96d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-adblock
 * [new ref]         dbac42e9f691c57302cd702c5bd33868fde3b96d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dbac42e Bump more dependencies to the latest version