$ git clone -n https://src.fedoraproject.org/rpms/rust-impl-more.git /var/lib/mock/f45-build-42530-794/root/chroot_tmpdir/scmroot/rust-impl-more
Cloning into '/var/lib/mock/f45-build-42530-794/root/chroot_tmpdir/scmroot/rust-impl-more'...
$ git fetch origin 768308f291ca11d520ca7f9e79fdcb15d88fe2f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-impl-more
 * [new ref]         768308f291ca11d520ca7f9e79fdcb15d88fe2f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 768308f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild