$ git clone -n https://src.fedoraproject.org/rpms/rust-time-core.git /var/lib/mock/f38-build-side-42-init-devel-1135847-30361/root/chroot_tmpdir/scmroot/rust-time-core
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1135847-30361/root/chroot_tmpdir/scmroot/rust-time-core'...
$ git fetch origin ad5cd9d0305d723130b7a50a41c1fdb4830a4e45:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-time-core
 * [new ref]         ad5cd9d0305d723130b7a50a41c1fdb4830a4e45 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad5cd9d Update to version 0.1.1; Fixes RHBZ#2195841