$ git clone -n https://src.fedoraproject.org/rpms/rust-ossl.git /var/lib/mock/f45-build-43601-804/root/chroot_tmpdir/scmroot/rust-ossl
Cloning into '/var/lib/mock/f45-build-43601-804/root/chroot_tmpdir/scmroot/rust-ossl'...
$ git fetch origin 203468673b9c70c8d2f1682d58cf110a693cb35e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ossl
 * [new ref]         203468673b9c70c8d2f1682d58cf110a693cb35e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2034686 Update to version 1.5.3; Fixes RHBZ#2537842