$ git clone -n https://src.fedoraproject.org/rpms/rust-time-core.git /var/lib/mock/f40-build-2040126-48325/root/chroot_tmpdir/scmroot/rust-time-core
Cloning into '/var/lib/mock/f40-build-2040126-48325/root/chroot_tmpdir/scmroot/rust-time-core'...
$ git fetch origin 8eb590de55e73a2d3c03f8c068fe5cd77a611f50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-time-core
 * [new ref]         8eb590de55e73a2d3c03f8c068fe5cd77a611f50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8eb590d Update to version 0.1.2; Fixes RHBZ#2240433