$ git clone -n https://src.fedoraproject.org/rpms/rust-iana-time-zone.git /var/lib/mock/f38-build-side-42-init-devel-1393815-31050/root/chroot_tmpdir/scmroot/rust-iana-time-zone
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1393815-31050/root/chroot_tmpdir/scmroot/rust-iana-time-zone'...
$ git fetch origin 5c977166b08ed086e81ce9faf58839352db45438:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-iana-time-zone
 * [new ref]         5c977166b08ed086e81ce9faf58839352db45438 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5c97716 Update to version 0.1.57; Fixes RHBZ#2213192