$ git clone -n https://src.fedoraproject.org/rpms/rust-libcryptsetup-rs0.9.git /var/lib/mock/f42-build-side-1-3589295-46957/root/chroot_tmpdir/scmroot/rust-libcryptsetup-rs0.9
Cloning into '/var/lib/mock/f42-build-side-1-3589295-46957/root/chroot_tmpdir/scmroot/rust-libcryptsetup-rs0.9'...
$ git fetch origin b017a3a8bf0d0f2523468f1428bfa73954286150:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libcryptsetup-rs0.9
 * [new ref]         b017a3a8bf0d0f2523468f1428bfa73954286150 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b017a3a compat package no longer needed