$ git clone -n https://src.fedoraproject.org/rpms/rust-ascii.git /var/lib/mock/f39-build-1526062-36059/root/chroot_tmpdir/scmroot/rust-ascii
Cloning into '/var/lib/mock/f39-build-1526062-36059/root/chroot_tmpdir/scmroot/rust-ascii'...
$ git fetch origin f75a5a9cf591ef62719ee816beef6a8297764c92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ascii
 * [new ref]         f75a5a9cf591ef62719ee816beef6a8297764c92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f75a5a9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild