$ git clone -n https://src.fedoraproject.org/rpms/rust-crc2.git /var/lib/mock/f38-build-side-42-init-devel-1394363-31050/root/chroot_tmpdir/scmroot/rust-crc2
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1394363-31050/root/chroot_tmpdir/scmroot/rust-crc2'...
$ git fetch origin 80677f2df1283418427d88d64c1c405dbcf2de50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-crc2
 * [new ref]         80677f2df1283418427d88d64c1c405dbcf2de50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 80677f2 Initial import (crc 2 compat package)