$ git clone -n https://src.fedoraproject.org/rpms/rust-time-macros.git /var/lib/mock/f45-build-45467-823/root/chroot_tmpdir/scmroot/rust-time-macros
Cloning into '/var/lib/mock/f45-build-45467-823/root/chroot_tmpdir/scmroot/rust-time-macros'...
$ git fetch origin f07b922819057c7a9c49a54ff81e9d6e67f25dd2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-time-macros
 * [new ref]         f07b922819057c7a9c49a54ff81e9d6e67f25dd2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f07b922 Update to version 0.2.32; Resolves RHBZ#2488274