$ git clone -n https://src.fedoraproject.org/rpms/rust-jiter.git /var/lib/mock/f45-build-42738-796/root/chroot_tmpdir/scmroot/rust-jiter
Cloning into '/var/lib/mock/f45-build-42738-796/root/chroot_tmpdir/scmroot/rust-jiter'...
$ git fetch origin 120ca18585a9bdcf5d1d4200b047699db1205da4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-jiter
 * [new ref]         120ca18585a9bdcf5d1d4200b047699db1205da4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 120ca18 Update to version 0.17.0; Fixes RHBZ#2532593