$ git clone -n https://src.fedoraproject.org/rpms/rust-rkyv.git /var/lib/mock/f45-build-44375-813/root/chroot_tmpdir/scmroot/rust-rkyv
Cloning into '/var/lib/mock/f45-build-44375-813/root/chroot_tmpdir/scmroot/rust-rkyv'...
$ git fetch origin a7562376d391f8b24329e1f168c4d86da0a8f248:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rkyv
 * [new ref]         a7562376d391f8b24329e1f168c4d86da0a8f248 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a756237 Update to version 0.8.18; Fixes RHBZ#2511539