$ git clone -n https://src.fedoraproject.org/rpms/rust-openssl-sys.git /var/lib/mock/f40-build-2250947-54097/root/chroot_tmpdir/scmroot/rust-openssl-sys
Cloning into '/var/lib/mock/f40-build-2250947-54097/root/chroot_tmpdir/scmroot/rust-openssl-sys'...
$ git fetch origin ab04b3ffb5af2abaa2e2d0171f6b9c2cb1b62ff9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-openssl-sys
 * [new ref]         ab04b3ffb5af2abaa2e2d0171f6b9c2cb1b62ff9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab04b3f Update to version 0.9.98; Fixes RHBZ#2252869