$ git clone -n https://src.fedoraproject.org/rpms/rust-time.git /var/lib/mock/f38-build-side-43-rust-devel-1397651-31053/root/chroot_tmpdir/scmroot/rust-time
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397651-31053/root/chroot_tmpdir/scmroot/rust-time'...
$ git fetch origin e56a7a380fdb5362fe008198fb9b333281289a83:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-time
 * [new ref]         e56a7a380fdb5362fe008198fb9b333281289a83 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e56a7a3 Update to version 0.3.29; Fixes RHBZ#2240432