$ git clone -n https://src.fedoraproject.org/rpms/rust-webpki-roots0.26.git /var/lib/mock/f45-build-46175-831/root/chroot_tmpdir/scmroot/rust-webpki-roots0.26
Cloning into '/var/lib/mock/f45-build-46175-831/root/chroot_tmpdir/scmroot/rust-webpki-roots0.26'...
$ git fetch origin 5aec4e8ab8288d8cc6f352d3fbce0a22eeeac7dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-webpki-roots0.26
 * [new ref]         5aec4e8ab8288d8cc6f352d3fbce0a22eeeac7dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5aec4e8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild