$ git clone -n https://src.fedoraproject.org/rpms/rust-jsonwebkey.git /var/lib/mock/f45-build-42723-796/root/chroot_tmpdir/scmroot/rust-jsonwebkey
Cloning into '/var/lib/mock/f45-build-42723-796/root/chroot_tmpdir/scmroot/rust-jsonwebkey'...
$ git fetch origin b7462b52bb7c5b129158cc1161efc2e9d97b1838:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-jsonwebkey
 * [new ref]         b7462b52bb7c5b129158cc1161efc2e9d97b1838 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b7462b5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild