$ git clone -n https://src.fedoraproject.org/rpms/rust-memoffset.git /var/lib/mock/f45-build-43240-801/root/chroot_tmpdir/scmroot/rust-memoffset
Cloning into '/var/lib/mock/f45-build-43240-801/root/chroot_tmpdir/scmroot/rust-memoffset'...
$ git fetch origin 069854f91809f3bee74aa54399566cfb13e5e7eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-memoffset
 * [new ref]         069854f91809f3bee74aa54399566cfb13e5e7eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 069854f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild