$ git clone -n https://src.fedoraproject.org/rpms/rust-hostname-validator.git /var/lib/mock/f39-build-1521768-35856/root/chroot_tmpdir/scmroot/rust-hostname-validator
Cloning into '/var/lib/mock/f39-build-1521768-35856/root/chroot_tmpdir/scmroot/rust-hostname-validator'...
$ git fetch origin e0c6828d87fe8b0dd45474e7f37ac27d185c2ddc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-hostname-validator
 * [new ref]         e0c6828d87fe8b0dd45474e7f37ac27d185c2ddc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0c6828 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild