$ git clone -n https://src.fedoraproject.org/rpms/rust-clap2.git /var/lib/mock/f45-build-40800-776/root/chroot_tmpdir/scmroot/rust-clap2
Cloning into '/var/lib/mock/f45-build-40800-776/root/chroot_tmpdir/scmroot/rust-clap2'...
$ git fetch origin f30ad69dbed30e1af6775b4c78fb870c1cb35db3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clap2
 * [new ref]         f30ad69dbed30e1af6775b4c78fb870c1cb35db3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f30ad69 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild