$ git clone -n https://src.fedoraproject.org/rpms/rust-sscanf.git /var/lib/mock/f41-build-side-1-2770727-32179/root/chroot_tmpdir/scmroot/rust-sscanf
Cloning into '/var/lib/mock/f41-build-side-1-2770727-32179/root/chroot_tmpdir/scmroot/rust-sscanf'...
$ git fetch origin 5c999032a5e1ec0fd20a369baec7f8d0d40535df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sscanf
 * [new ref]         5c999032a5e1ec0fd20a369baec7f8d0d40535df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c99903 Update to version 0.4.2; Fixes RHBZ#2299290