$ git clone -n https://src.fedoraproject.org/rpms/rust-clap_mangen.git /var/lib/mock/f45-build-40825-776/root/chroot_tmpdir/scmroot/rust-clap_mangen
Cloning into '/var/lib/mock/f45-build-40825-776/root/chroot_tmpdir/scmroot/rust-clap_mangen'...
$ git fetch origin e2d8a04cd1a83664195adb1fe56901097e0047f5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clap_mangen
 * [new ref]         e2d8a04cd1a83664195adb1fe56901097e0047f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2d8a04 Update to version 0.3.3; Fixes RHBZ#2452331