$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_fmt.git /var/lib/mock/f39-build-2096675-50404/root/chroot_tmpdir/scmroot/rust-sval_fmt
Cloning into '/var/lib/mock/f39-build-2096675-50404/root/chroot_tmpdir/scmroot/rust-sval_fmt'...
$ git fetch origin e5caaae8543785d1b210b50575461e5d6a831e0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_fmt
 * [new ref]         e5caaae8543785d1b210b50575461e5d6a831e0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e5caaae Update to version 2.10.2; Fixes RHBZ#2239955