$ git clone -n https://src.fedoraproject.org/rpms/rust-adblock.git /var/lib/mock/f45-build-39980-765/root/chroot_tmpdir/scmroot/rust-adblock
Cloning into '/var/lib/mock/f45-build-39980-765/root/chroot_tmpdir/scmroot/rust-adblock'...
$ git fetch origin 0fcff8167628feff4b0f1ced73ef986c18d6642b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-adblock
 * [new ref]         0fcff8167628feff4b0f1ced73ef986c18d6642b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fcff81 Update to version 0.12.6