$ git clone -n https://src.fedoraproject.org/rpms/libdstr.git /var/lib/mock/f42-build-3273913-41313/root/chroot_tmpdir/scmroot/libdstr
Cloning into '/var/lib/mock/f42-build-3273913-41313/root/chroot_tmpdir/scmroot/libdstr'...
$ git fetch origin 3922a7ca215b88180ad8bf42ec8df68f44cef910:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdstr
 * [new ref]         3922a7ca215b88180ad8bf42ec8df68f44cef910 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3922a7c Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild